Fix always-on is not turned off when user forgets vpn

Change-Id: Iad285ff06abde71ef040cbb29f740bcf20c3bbb7
Fix: 29991174
diff --git a/src/com/android/settings/vpn2/AppManagementFragment.java b/src/com/android/settings/vpn2/AppManagementFragment.java
index 99d2f55..b306577 100644
--- a/src/com/android/settings/vpn2/AppManagementFragment.java
+++ b/src/com/android/settings/vpn2/AppManagementFragment.java
@@ -80,7 +80,7 @@
         public void onForget() {
             // Unset always-on-vpn when forgetting the VPN
             if (isVpnAlwaysOn()) {
-                setAlwaysOnVpnByUI(false);
+                setAlwaysOnVpn(false);
             }
             // Also dismiss and go back to VPN list
             finish();
@@ -187,14 +187,18 @@
         if (mUserId == UserHandle.USER_SYSTEM) {
             VpnUtils.clearLockdownVpn(getContext());
         }
-        final boolean success = mConnectivityManager.setAlwaysOnVpnPackageForUser(mUserId,
-                isEnabled ? mPackageName : null, /* lockdownEnabled */ false);
+        final boolean success = setAlwaysOnVpn(isEnabled);
         if (isEnabled && (!success || !isVpnAlwaysOn())) {
             CannotConnectFragment.show(this, mVpnLabel);
         }
         return success;
     }
 
+    private boolean setAlwaysOnVpn(boolean isEnabled) {
+         return mConnectivityManager.setAlwaysOnVpnPackageForUser(mUserId,
+                isEnabled ? mPackageName : null, /* lockdownEnabled */ false);
+    }
+
     private boolean checkTargetVersion() {
         if (mPackageInfo == null || mPackageInfo.applicationInfo == null) {
             return true;